Synthesis and characterization of tri(o-fluorobenzyl)tin esters of heteroaromatic carboxylic acid and crystal structures of tri(o-fluorobenzyl)tin esters of 4-pyridinecarboxylic acid and 3-pyridinecarboxylic acid
作者:Handong D. Yin、Chuanhua Wang、Chunlin Ma、Daqi Wang
DOI:10.1016/j.jorganchem.2003.10.009
日期:2004.1
structures of tri(o-fluorobenzyl)tin esters of 4-pyridinecarboxylic acid (5) and 3-pyridinecarboxylic acid (6) were determined by single crystal X-ray diffraction. In the crystals of compounds 5 and 6, the tin atoms are rendered five-coordinate in a trigonal bipyramidal structure by coordinating with pyridine N atom of carboxylate group. The resulting structure is a one-dimensional linear polymer containing
化学计量的三(邻氟苄基)氯化锡与杂芳族羧酸钠反应,生成(2- F -Bz)3 SnOOCR类型的络合物(R = 2-呋喃基,2-呋喃基,2-硫代苯基, 2-吡啶基,3-吡啶基,4-吡啶基,3-吲哚基,3-吲哚甲基和3-吲哚丙基)。这些配合物已通过元素分析,IR和1 H NMR光谱进行了表征。通过单晶X射线衍射测定了4-吡啶羧酸(5)和3-吡啶羧酸(6)的三(邻氟苄基)锡酯的晶体结构。在化合物5和6的晶体中,通过与羧酸根的吡啶N原子配位,锡原子在三角双锥体结构中呈五配位。所得结构是一维线性聚合物,其Sn-O键长为2.161(4),2.202(9),Sn-N键长为2.518(5),2.454(10)。
The first isolation of a π-complex precursor in Meisenheimer complex formation
Treatment of 1,3,5-trinitrobenzene with indole-3-carboxylate ion in
methanol affords an isolable Ï-complex which is the precursor of the N-
and C-adducts expected from the interaction.